Crusher-head for grinding-mills.



H. A. HUNT.

GRUSHER HEAD FOB GRINDING MILLS.

. APPLICATION FILED MAR. 12, 1912.

Patented May 14, 1912.

In ven tor:

To alliwhom it mayyconcem:

UNITED STATES P E N OFFICE- HARRY A. HUNT, OF WILMINGTON, DELAWARE.

-. Be it known that I HARRY A. HUNT, a

a My invention re and similar hard substances; and particu larly to that type of crusher head in whlch a supporting center or core located upon-the main shaft of the'mill is employed and whlch core'is surrounded by a mantle formed commonly fromcast manganese 'ste'el, whereby the mantle when'w'orn out in use may be readily removed and anew mantle substituted therefor.

The supporting 'core or center of crusher heads of the 'typeabove referred to is com- 'monly conical in form, and the mantle" is in the form of a comparatively thin shell also of conical form; Sucha mantle when made of cast maganese steelin order to secure excessive strength'and wearing'quali ties is found to stretch considerably in use as cast maganese steel while extremely hard and tou and core togetherso driven from the core. I

his quite ductile and the action of the bar material thereupon will cause the metal to flow, from which it follows that in use the mantle will become loose upon the core unlessprovision is made for compensating for the expansion of the mantle. v

. The object of my invention is to provide means for adjusting the mantle longitudinally u on the conical supporting core above referred to in order to keep the mantle tight thereupon;and the same consists in means for: forcing the surrounding mantle downward upon the'core', said adjusting means including also means for locking the mantle that the mantle will be A further object of my invention is to provide a crusher head, the inner surface of the removable mantleof which isv conical throughout the entire length of the mantle, so that a mantle is procured which is simple in form and which may-be'readlly cast, and

vention in view,

useful Improvements thereupon by means core '5 is commonly oRUSHER-HEAD FOR GRINDING-MILLS. I t;

the inner surface thereof finished With the above and othergobjects' improved crusher head hereinafter described modifications thereof as will be obvious to those skilled in the art to which my invensection of my improved crusher head ta en.

new showing a section upon a transverse lane indicated by' the line 2-.2,- Fig. 1, poking down; and Fig. 3 is a view showing my improved crusher head as seen from a -position beneath'it looking up.

-In the drawing, the-main driving shaft upon a. vertical central plane; Fig. 2 is a ee ing at a minimum of trouble and expense a of 1n-. my lnventlon consists 1n the a and claimed, and .in such variations and e0 invention is of a gyra'tory crushing mill is shownat 4, and 5 is asupportmg core or center conical in form and shown as formed separate from the driving shaft 4 and secured in place of suitable keys 6, al.-

though the core and shaft may be formed as a single integral'member if desired." The v I formed from carbon steel, cast ron or slmllar easlly machinable .metal, and the. periphery thereof finished by grinding orturning. Surrounding the sup: porting. core'5 is a mantle 7 conical in form and which mantle is' nally of the core,

may be compensated for or taken ing the mantletdownward upon the core.

The inner surface of the mantle is uniformlyadjustable I'ongitudiQ from which it follows that? any looseness between the core and mantle P by Patented Ma'y 14,119 123.

9,0 were such surfacebroken or interruptedby projections, and the said surface maybe continuous or s aced lugs or grinding pads such as are s own at 9 tolreduce the area of surface to be finished by grinding, in which case the:

spaces between the pads are filled with zinc, Babbitt metal or similar easily fusible metal as shown at 10; the" inner ends of the lugs 4 or pads being in contact with the periphery provided with a plurality of of the core and the fusible metal being poured into the space between the sides of the grinding pads or lugs and the surface of the core, as will be understood. The man tle 7 is positively driven from the supporting core or center 5, stood that friction between the coreand mantle contributes to the driving action, to which end the upper end of the core is provided with one or more recesses 11 and the mantle with a correspondingnumber of recesses 12, the recesses upon the core and mantle registering with one another when the mantle is in place. An annular collar -13 is provided which bears upon the upper end of the mantle, but not upon the upper tend of the core when the mantle is first put in place,'there being a space between the under side of the collar and the upper end of the vcore', as shown at 14. The collar is provided with projecting lugs 15 .correspending in number with the recesses formed in the core and mantle and which lugs lie within the recesses 11 and 12 of the core and mantle when the parts are assembled, from which it follows that the lugs upon the collar act as driving elements through which the mantle is driven from the core. The annular collar 13 may be forced downward by nuts 16 in threaded engagement with the main driving shaft 4, as will be understood. In view of the premises it will be obvious that when the mantle 7 becomes enlarged or stretched in use, and thus loose upon the central core 5, the collar 13 may be forced downward from time to time, whereby the mantle 7 will be forced downward upon the core 5 and-looseness between the two taken up and a tight fit maintained between the core-and mantle; the mantle being always positively driven from the core through the lugs or projections 15 upon the annular collar.

Having tlr us described and explained my inventionQI claim and desire to secure by Letters Patent p 1. Ina crusher head, a supporting core conical-in form and having a recess at its smaller end; a conical mantle surrounding said core, and adjustable longitudinally thereupon, said mantle having a recess at its smaller end adapted to register with the recessaforesaid in said core; an annular collar adjacent the smaller ends of said core and mantle; and a lug upon-said collar and which lug lies within the recesses aforesaid when the parts are assembled.

2. In a crusher head, a supporting core conical in form and having a-recess at its smaller end; a' conical mantle surrounding said core and" adjustable longitudinally thereupon, said mantle having a recess at its smaller end adapted to register with the although it will be underrecess aforesaid in said core; an annular collar overlying the smaller ends of said core and mantle; and a lug upon said collar and which lug lies within the recesses aforesaid when the parts are assembled.

3. In a crusher head, a supporting core conical in form and having a recess at its smaller end; a conical mantle surrounding said core and adjustable longitudinally thereupon and the smaller end of which projects above. the corresponding end of said core,- said mantle having a recess at its smaller end adapted to register with the recess aforesaid in said core; an annular collar overlying the smaller ends of said core' and mantle; and a lug upon said collar and which lug lies within the recesses aforesaid when the parts are assembled. I

4:. In a crusher head, asupporting core conical in form and having"a recess at its smaller end; a mantle surrounding said core and adjustable longitudinally thereupon and the inner surface of which is conical in form throughout its entire length, said mantle having a recess at its smaller end adapted to register with the recess aforesaid .in said core; an annular collar adjacent the smaller ends of said core and mantle; and a lug upon said collar and which lug lies within the recesses aforesaid when the parts are assembled.

5. In a crusher head, a supporting core conical in form and having a recess at its smaller end; a mantle surrounding said core and adjustable longitudinally thereupon, the

inner surface of which mantle is conical 1n form throughout its entire length and the smaller end of which projects above the corresponding end of said core, said mantle having a recessat its smaller end adapted to register with the recess aforesaid in said core; an annular collar overlying the smaller ends of said core and mantle; and a lug upon said collar and which lug lies within the recesses aforesaid when the parts are assembled.

6; In a crusher head, a supporting core conical in form and having a recess at-its smaller end; a conical mantle surrounding said core and adjustable longitudinally thereupon, said mantle having a recess at its smaller end adapted to register with the recess aforesaid in said core; means adjacent the smaller ends of said core and mantle for forcingsaid mantle longitudinally of said core; an a projectingelement carried by said forcing means and adapted to liewithin the recessesaforesaid when the parts are assembled.

7. In a crusher head, a supporting core conical in form and having a recess; a comcal mantle surrounding said core and ad-- justable longitudinally thereupon, said mantle having a recess adapted to register with the recess aforesaid in said core; means engaging the smaller end of said mantle for forcing the same longitudinally of said core; and a member adapted to lie within the recesses aforesaid when the parts are as smbled 'and through which said mantle is driven from said core.

Signed at Wilmington, in the county of Newcastle, and State of Delaware this sixth day of March, A. D. 1912.

' HARRY A. HUNT.

Witnesses:

J. PHILIP ExToN, FRED O. RUSH. 

